Re: Disk ][ Drives not working

[Wayne Stewart <waynes@telus.dotnet>]

Jeff Blakeney wrote:

> I once plugged a Disk ][ onto my controller card but I think I had the
> pins off by one to the right or left, not missing an entire row like
> Bill mentioned, and I literally blew a large hole out of the top of a
> 74LS125 (I think that was the chip) in the Disk ][.  I was unable to
> fix it myself (I did try) and paid to get it repaired at an Apple
> dealer and within a week or two the drive motor died and the dealer
> replaced the drive with no charge after that.
>
> I'm pretty sure the first repair was to simply replace the analog card
> and the second was probably to replace most, if not all, of the parts
> in the drive.  :-)

Did that a long time back. I even heard the pop when it blew the hole
in the 74LS125 and saw the smoke coming out of the floppy drive :-)

I replaced the 74LS125 and one of the other 3 chips. Either the MC3470
or ULN2003.

I've been more careful and haven't made that mistake since. Made lots
of others though.

Wayne